Rope made from synthetic thermoplastics



United States 3,023,483 ROPE MADE FROM SYNTHETIC THERMOPLASTICS WalterSteiner, Oberseenerstrasse 14, Winterthur, Switzerland Filed Mar. 3,1959, Ser. No. 796,793 2 Claims. (Cl. 28-81) Up till now ropes made fromsynthetic thermoplastics were all characterized by having a smooth outersurface, the consequence being that the clothes pegs could not grip therope securely, and therefore had the tendency to slip or slide along thesurface of the rope in windy weather.

The object of the present invention is to overcome this difficulty. Theinvention relates in particular to ropes made from syntheticthermoplastics intended for the purpose of hanging up clothes to dry andis featured in particular by the outer covering surface having goodgripping properties.

The accompanying drawing shows various forms of application of theembodiment of the present invention, by way of example only, wherein:

FIG. 1 is a side elevation of a portion of a rope provided withlongitudinal parallel grooves;

FIG. 2 is a transverse sectional view of the form of the invention shownin FIG. 1; I

FIG. 3 is a side elevational view of a modified form of the inventionwherein the outer surface is provided with helical grooves;

FIG. 4 is a transverse sectional view of the form of the invention shownin FIG. 3;

FIG. 5 is a side elevational view of a portion of rope wherein the outercovering is provided with a filling made from loose filaments;

FIG. 6 is a transverse sectional View of the form of the invention shownin FIG. 5;

FIG. 7 is a side elevational view of a form of the invention providedwith an inner core of non-stretchable material and with a roughenedouter surface;

FIG. 8 is a transverse sectional view of the form of the invention shownin FIG. 7;

FIG. 9 is a side elevational view of a rope of substantially triangularcross-sectional configuration;

FIG. 10 is a transverse sectional view of the form of the inventionshown in FIG. 9;

FIG. 11 is a side elevational view of a form of the invention having asquare cross-sectional configuration;

FIG. 12 is a transverse sectional view of the form of the inventionshown in FIG. 11;

FIG. 13 is a side elevational view of an embodiment of the inventionhaving cut-outs forming narrow ledges in the rope;

FIG. 14 is a transverse sectional view of the form of the inventionshown in FIG. 13.

The covering outer surface of the rope 10 made from syntheticthermoplastics, as depicted in FIGS. 1 and 2 is provided withlongitudinal parallel grooves 11 between which are formed correspondingridges 12 which provide a good gripping surface for the clothes pegs, sothat any tendency on the part of the latter to slip or slide along therope is effectively prevented.

The rope shown in FIGS. 3 and 4 differs from the form illustrated inFIGS. 1 and 2 in that its outer covering surface is provided withhelical grooves between which are also formed sharp edged ridges 12awhich assure a good gripping surface for the clothes pegs used to hangup the clothes to dry.

FIGS. 5 and 6 represent a rope made from synthetic thermoplastics usedin the main for hanging up clothes to dry, which consists essentially ofa comparatively thin walled tube 10a, the outer covering surface ofwhich is provided with sharp edged ridges 12b (FIG. 5). The tube 10a isprovided with a filling made from loose synthetic filaments 120, so thatthe rope, on the clothes pegs being fixed, is slightly compressed, thusaffording a good grip and eifectively preventing any tendency on thepart of the pegs to slip or slide.

The rope 10 as illustrated in FIGS. 7 and 8 represents a furtherapplication of the embodiment of the invention. Here good grippingproperties are secured by the outer covering surface of the rope beingroughened, so that the protruberances 13 assure a good grip for theclothes pegs, thus preventing any tendency of the latter to slip. Inorder to prevent undue stretching of the rope, the latter is providedwith a core 14 made from material that has no tendency to stretch. Theouter covering material being formed of thermoplastic material isrelatively stretchable with respect to the non-stretchable center coreand better enables a clothespin and like article to safely withincreased friction engage the rope 10.

FIGS. 9 and 10 show a rope 10 made from synthetic thermoplastics andintended for hanging up clothes to dry, the cross section of which istriangular with sharp outer edges. The outer surfaces or faces areconcave, so that hollow depressions 15 are formed in the direction ofthe axis, into which the clothes pegs project on being fixed to therope, a good grip being thus secured. These hollow surfaces can also beroughened. As seen from the illustration 9 the rope is provided with atwist.

FIGS. 11 and 12 show a rope 10'that differs from the one described aboveonly by its cross section being square instead of triangular. This isequally provided with a core 14 to prevent undue stretching in thelongitudinal direction. The hollow concave surfaces 15 form sharp edgesat their junction, which give Way and are slightly deformed on theclothes pegs being fixed, thus affording a good grip and effectivelypreventing any tendency of the pegs to slip or slide on the rope. Thepegs should be fixed so as to encompass two of the projecting edges 15.

FIGS. 13 and 14 show a rope 10 made from synthetic thermoplasticsintended primarily for hanging up clothes to dry, in which narrow ledgesor cross pieces 16 are spaced along the length of the rope, these ledgesbeing angul-arly displaced relatively to one another by and abutting oneither side on circular stops 17. The clothes pegs are fixed on thenarrow crosspieces 16 and sliding or slipping is prevented by theabutment stops 17.

These ropes made from synthetic thermoplastics can equally be used tohang up any other goods to dry, such as paper, woven material and soforth.

I claim: 9

1. A rope comprising in combination a center core made of nonstretchablematerial, an outer covering about said core made of relativelystretchable synethetic plastic material, said outer covering having afriction inducing gripping surface with narrow ledges formed thereon bysubstantially semicylindrical cutouts in said outer covermg.

2. A rope according to claim 1, wherein said narrow ledges are angularlydisplaced with regard to one another.

References Cited in the file of this patent UNITED STATES PATENTS414,090 Taylor Oct. 29, 1889 1,659,556 Bankwitz Feb. 21, 1928 1,773,969Dreyfus et a1 Aug. 26, 1930 1,902,953 Hazell Mar. 28, 1933 2,369,876Warren, Jr Feb. 20, 1945 2,434,533 Wurzburger J an. 13, 1948 2,743,511Genovese May 1, 1956 2,894,366 Leckie July 14, 1959

1. A ROPE COMPRISING IN COMBINATION A CENTER CORE MADE OF NONSTRETCHABLEMATERIAL, AN OUTER COVERING ABOUT SAID CORE MADE OF RELATIVELYSTRETCHABLE SYNTHETIC PLASTIC MATERIAL, SAID OUTER COVERING HAVING AFRICTION INDUCING GRIPPING SURFACE WITH NARROW LEDGES FORMED THEREON BYSUBSTANTIALLY SEMICYLINDRICAL CUTOUTS IN SAID OUTER COVERING.